Title :
Sum-frequency spectroscopic investigation of the alignment of liquid crystals on self-assembled monolayers and imaging of endgrafted alpha-helical polypeptide films
Author :
Knoesen, André ; Pakalnis, Saulius ; Follonier, Stephane ; Miller, William ; Abbott, Nick ; Lee, Nancy ; Frank, Curt
Author_Institution :
California Univ., Davis, CA, USA
Abstract :
We highlight the unique attributes of sum-frequency spectroscopy by reviewing two case studies performed in our laboratory to investigate the orientation of macromolecules at interfaces. The first case study illustrates how spectral information of sum-frequency spectroscopy can be used to probe the orientation of monolayers and also independently probe the anisotropy of a metal interface, which influences the orientation of the monolayers, buried below a monolayer. The second case study illustrates how sum-frequency spectroscopy can be used to obtain spatial information of the uniformity of distribution and the density of coverage of synthetic proteins that are deposited as thin films
Keywords :
chemisorbed layers; infrared spectra; liquid crystals; molecular biophysics; molecular orientation; monolayers; optical frequency conversion; proteins; self-assembly; buried interface; chemisorbed films; density of coverage; endgrafted alpha-helical polypeptide films; interface anisotropy; liquid crystals alignment; polar orientation patterns; polypeptide thin films; self-assembled monolayers; spatial information; sum-frequency spectroscopy; synthetic proteins; uniformity of distribution; Anisotropic magnetoresistance; Gold; Liquid crystals; MONOS devices; Performance evaluation; Polymer films; Probes; Resonance; Spectroscopy; Wavelength measurement;
Conference_Titel :
Lasers and Electro-Optics Society, 2001. LEOS 2001. The 14th Annual Meeting of the IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-7105-4
DOI :
10.1109/LEOS.2001.968974
